I will trust this forum over any other forum for rule reference...
Rarely did the consensus end up wrong here.
There is also many back up reference in this game and many other game that All could mean Zero
There is also the problem that no one address that there is an and. "remove all of its focus and evade tokens" So according to your definition of at least having one, then you need at least one focus and one evade token, if you can't satisfy the condition then you take 1 dmg